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1929. s. L. WALSOE COMPUTING MACHINE Filed Feb. 9, 1928 INVENTOR BY M 3M ATTORNEY WITNESSES Patented Dec. 10, 1929 UNET S SIGURD L. WALSOE, 0F LYNDHURST, NEW JERSEY, ASSIGNOR TO REMINGTON TYPE NEW YORK, A CORPORATION OF NEW YORK WRITER COMPANY, OF ILION,

COMPUTING MACHINE Application filed February 9, 1928. Serial No. 253,114.

My invention relates to computing machines, and more especially to combined typewriting and computing machines.

In certain classes of work done on these machines, the cross totalizer is used to compute balances most of which are of the same sort but some of which are of an opposite sort. For example, in some work most of the balances are debit balances but a certain number of them are credit balances; and it is desirable to-mark these credit balances plainly so that they will be picked up later on as credit balances instead of debit balances. This is commonly done by printing the credit balances in a distinctive color as red, but that does not show on carbon copies. It is thereforedes'irable to mark the credit balances in some Way that will show on the carbon copies. One solution of this problem is described in the application of Frederick A. Hart filed February 2, 1928, Sr. No. 251,332, and the present invention may be regarded as In the nature of .an improvement on the Hart construction.

To the above and other ends my invention consists in certain features of construction, and combinations and arrangements of parts, all of which will be fully set forth herein and particularly pointed out in the claims.

An instance of my invention is illustrated in the accompanying drawing in which Figure 1 1s a perspective View of a fragmentary character and showing my invention applied to 2. Remington combined type lwriting and computing machine.

Figure 2 is a fragmentary sectional view on the vertical plane indicated by the hue 2, 2 of Fig. 1 and looking toward the rear.

In the drawing only those parts of the liemington machine are shown that are close- 1y associated with my improvements.

The computing mechanism of the Remington machine is in the main constructed substantially as shown in the patent to Wahl,

N0. 1,270,471. dated June 25, 1918, and as far as the present invention is concerned, the said mechanism may be identical with that shown in said patent. Said patent shows the computing mechanism attached to a No. 11 Remington typewriter. The drawing indicates a Remington No. 12 typewriter, two of whose type bars 1 and 2 are shown pivoted on the usual segmental wire 3 and operated by bell cranks 4 and 5 pivoted as-usual on a horizontal wire 6. These bell cranks are like two of those near the right-hand side of the. type action except that their horizontal arms have been modified as will be apparent hereinafter. The machine as a whole may be fully equipped with letter and figure type bars and keys.

The computing mechanism includes a cross totalizer 7 which is like that shown in the Wahl patent cited, except that it is provided with clearance testing mechanism of the kind shown in the patent to Arthur F. Poole, 'No. 1,483,679, dated Feb. 12, 1924, said clearance testing mechanism including a'fin er 8 projecting upward from the totalizer through a slot 10 which permits the finger to rock front and back. When the totalizer is clear this finger occupies its rear position shown in the drawing but when not clear it stands farther forward.

The cross totalizer is operated from the numeral keys of the typewriter by means of a cross master wheel which is reversible by certain cams mounted on the vertical totalizers, any desired number of which may be mounted on a truck which travels with the typewriter carriage and which totalizers are operated by a vertical master wheel, not shown. The cams mentioned can set the cross master wheel for addition and for subtraction and in either instance said master wheel can be reversed by a reversing mechanism, a portion of which consists of a double link 11 corresponding to that one which in the Wahl patent is numbered 384,385. The means shown in the drawing for operating this double link are of the sort shown in the patent to Frederick June 1, 1926, this being the form of mechanism at present in use on the Remington machine. The link 11 is pivoted to the vertical arm of a bell crank 12 which is pivoted at 13 and is connected by a link 14 with a correction key lever 15 pivoted at 16. The construction is such that the link 11 normally occupies its left-hand position but upon depres- A. Hart, No. 1,587,304, dated sion of the kev lever 15 it will be moved toward the right and will reverse both maste r wheels whatever may have been their pre- VlOllS settings.

The rear arm of the lever 15 is prolonged and furnished with a headed stud 17 working in a vertical slot in the upper end of a link 18 which at its lower end is pivoted to a lever arm 20 which is mounted on a fore-andaft extending rock shaft 21. Said lever has a leftward extending arm 22 to which at 2 is pivoted a three-armed lever 24. Said threearmed lever carries a so-called credit halance key 25 on its leftward extending arm and a release key 26 on its rightward extending arm. The third arm of the lever extends downward and rightward in a curve and. has in it a curved slot 27 which runs over a fixed pin 28, said slot having at its end an offset 30 which at the end of the downward depression of the key 25 engages the pin 28 and locks the-parts in their operated position againstthe tension of any suitable returning spring such as the spring 31. It will be seenth'at this operation moves the link 11 rightward and reverses the computing mechanism the same as the correction key 15, but in this instance a depression of the credit balance'key' leaves the parts locked in their shifted position.

The .pin' 28 projects from a sheet metal plate or frame 32 secured to the left-hand front postof'the typewriter and the shaft 21 is pivoted 'near its front end in this plate. Saidshaft carries at its=forward end wings 33-"by which itcan be turned a limited distance-independently of the lever 22, 20 but there is a yielding connection between the hub 34 of said wings and the hub of said lever,.so=that ordinarily the shaft and the lever rock'together. Their relative motion is limited by a pin 35 projecting from the shaft 21 into a notch in the hub of the lever 22.

The shaft'21 is the regular ribbon controlling shaft of the typewriter. In the back part of the machine it has projecting downward therefrom an arm 36 to which is pivoted a link 37 which extends to the ribbon vibrator mechanism. If a twocolor ribbon is used, it will print black when this link 07 occupies its left-hand position shown, but is shifted rightward, as by the depression of the credit balance key 25 it will cause red printing. The ribbon vibrator mechanism may be of any. suitable construction. That at present used in the Remington machine is shown in the patent to John H. Barr, No. 1,153,668, dated Sept. 14, 1915.

The clearance proof mechanism immeriately controlled by the finger S is not of the kind shown in the Poole patent alzore referred to but is of the kind described in the application for patent of Frederick A. Hart. filed October 9, 1925, Sr. No. 61.471. A slice. metal bracket 38 is secured to the main casting of the computer actuator and pivoted thereto at 40 is a horizontal lever 41 having an ear 42 bent oll' therefrom and slotted to engage an edge of the bracket 38 for guiding purposes. Attached to the front face of this lever by posts 43 is a cam bar 44 so situated that when, the cross tot-alizer being clear, said totalizer makes its jump back to the right, the finger 8 will pass under this bar and raise it, as shown in the drawing; but if the cross totalizer is not clear and the finger 8 there fore occupies its forward position, said tingrr will more in front of the bar and not raise the latter. Said bar and the lever 41 are normall maintained in their lower positions not only by their own weight but also by a spring 1-5, the downward motion of the pa rts bei rig limited by a shelf 46 bent off from the bracket 38.

A lever 47 pivoted to the stationary framework at 48, has its -free end bifurcated and embracing the ear 42 of the lever 41 so that the lever 47 rocks up and down in unison with said lever 41. Said lever 47' has a downwardly extending arm ending in a leftwardlv projecting finger 50 which passes through a guide slot in a frame plate, not shown, of the actuator. Pivoted at 51 against the left face of this-frame plate is a bell crank 52, the upper arm of which normally stands just in front of the slot through which the finger 50 is adapted to project. When the parts are in the position shown in Fig. 1, this bell crank is free to move but when the levers 41 and 47 are in their lower positions, the finger 50 projects through the frame plate into the path of the bell crank 52and locks the latter against operation. The horizontal arm of said bell crank is connected by a link 53 with a clearance proof key lever 54 having its button 55 in the keyboard of the typewriter. This is what is sometimes called the start key. \Vhen a balance has been'copied out correctly from the cross totalizer, bringing the. latter to zero, in that step of the carriage from units to sub-units position said cross t-otalizer umps back to the position indicated in Fig. 1. In this position it will unlock the normally locked key 55, 54, provided the copying was correctly done and the cross totalizer was clear, and a clearance sign may be printed in sub-units position. If the cross totalizer was not clear the key 55 will remain locked and the signal cannot be printed.

According to the Hart invention set forth in his application, Sr. No. 251,332, one of the type bars, as the type bar 2, is equipped to print a signal, such for example as a star to indicate clearance. of a positive or debit balance; and another type bar, as the type bar 1, is equipped to print another sign, as Cld to indicate. clearance of a negative or credit baiancc. It will be seen that neither of these signs can be printed unless the totalizer is clear. Ordinarily a debit balance would be copied with the parts in the position shown in the drawing, said balance and the star being printed black, and the balance would be subtracted from the cross totalizer because the vertical totalizer in the balance column is usually equipped with a subtract cam. In case of a credit balance, however, it is necessary in order to clear the cross totalizer to add the balance in said cross totalizer. In other words, it is necessary to depress the credit balance key so as to reverse the cross master wheel. When that is done it automatically shifts the connection of the key lever 54 from type bar 2 to type bar 1 so as to print CR. In order to effect this result I mount upon the key lever 54 an upstanding arm 56 consisting of a piece of sheet metal extending upward between the forwardly directed arms of the bell cranks 4 and 5 and having pivoted thereto at its upper end a long link 57 extending across the machine above the set of key levers and pivoted at its left-hand end directly to an arm 58 secured to and depending from the rock shaft 21. The construction is such that when said rock shaft occupies its normal position the arm 56 occupies its left-hand position shown in the drawing, but when by the depression of the credit balance key or by the operation of the wings 33 the shaft 21 is rocked, the arm 56 will be swung rightward to engage the bell crank 4. To this end at suitable elevations the piece 56 has an car 60 projecting from its forward edge and bent leftward in such wise that when the parts stand as shown in Fig. 2 this ear overlies the bell crank 5 and serves as an operative connection between said bell crank and the key lever 54, so that in case said key lever is depressed, the bell crank 5 and type bar 2 will be operated. Projecting from the rear edge of the piece 56 is a second ear 61 bent rightward as shown and in such position that when the parts stand as shown in Fig. 2 and the key lever 54 is depressed, this car passes down between the two bell cranks; but if the rock shaft 21 be rocked and the piece 56 shifted rightward, this car 61 will overlie the bell crank 4 and cause the latter to be operated by the star key instead of the bell crank 5. thus operating the type bar 1 and printing CR to indicate clearance of a credit balance.

Each of the ears 60 and 61 is made with an abrupt lower edge and an inclined upwardly extending edge, as shown in Fig. 2, so that in case either of these ears should ever get below the appropriate bell crank arm by some misoperation, these inclined edges would act as wedges and by s za'iagingr the parts bring the piece 56 back to its correct position and relation on the upstroke of the key lever 54.

It is desirable that the piece 56' be incapable of rocking front-and-back so as to engage the bell cranks at proper points, and it is also desirable that this piece be capable of rocking slightly right-and-left. To this end the piece 56 is made of inverted T-shape, the arms of the T being connected to the lever 54 by means of two headed studs or rivets 62,these being made as shown in Fig. 2 with the space between the lever 54 and the head of the stud wider than the'thickness of-the piece 56. By making the holes in the said piece 56 slightly largerthan the studs 62, the necessary looseness ina fright-and-left direction is obtained and also freedom from rocking front-andback.

The connection from the key lever 54 to the bell cranks 4 and 5 is such that said key lever does not restore said bell cranks. Each of these particular bell cranks may therefore be provided with a restoring spring 63.

In some classes of work credit-balances are the normal and ordinary sort, and debit-balances the exception, and for this or for some other reason it may be desirable to reverse the action of the selecting piece 56, making it normally operate the bell crank 4 and causing it to actuate the bell crank 5 when the credit-balance key is depressed. To this end the arm 58 is reversible, being secured to the shaft for example by a set screw 64 so that said arm may be directed upward as indicated in dotted lines in Fig. 1 and thus reverse the action as just indicated.

The construction is extremely simple and is effective for the purpose for which it was designed.

What I claim as new and desire to secure by Letters Patent, is

1. The combination with a cross totalizer and printing mechanism including a rock shaft which controls the color of the printing; of clearance proof mechanism for said totalizer including a. clearance signal printing key controlled as to operativeness by the clear state of said totalizer, two types to print different clearance signs, a link connected with said key and shiftable laterally into position to connect with one or the other of said types, and a transverse link directly connecting said rock shaft with said laterally shiftable link.

2. The combination with atotalizer, printing mechanism, a key for reversing the operation of the totalizer and a rock shaft operated by said key for changing the color of the printing; of a clearance proof key lever for said totalizer controlled as to operativeness by the clear state of said totalizer, two types for printing difi'erent clearance signs, and upstanding link connected with said clearance proof key lever and shiftable laterally, and a link directly connecting said upstanding link with said rock sh aft.

3. The combination with a totalizer, and devices shiftable to one position for a positive balance and to another position for a negative balance; of clearance proof mechanism comprising a key, two types for printing different clearance signs, a link mounted on said key lever loosely by two studs so that said link cannot swing front-and-back but can swing laterally, means whereby said link in one position causes one of said types to be operated by said key and in the other position the other type, and means whereby said link is shifted by said shiftable devices.

Signed at the borough of Manhattan, city of New York, in the county of New York and state of New York this 8th day of February,

SIGURD L. W ALSOE. 

